JP4942964B2 - Drainage piping structure - Google Patents

Description

The present invention relates to a piping structure having a drain pipe that can be suitably used for constructing a drain pipe system.

  In a building such as an apartment house or a building, a drain pipe system is provided so as to penetrate each floor from the lowest floor to the uppermost floor (see, for example, Patent Document 1). In this type of drainage pipe system, standing pipe joint members such as drainage collecting pipes and straight pipe joints are arranged in a penetrating manner with respect to the floor slab separating each floor, and the standing pipe joint members of each floor are connected to each other such as straight pipes. It has a drainage piping structure that connects with a pipe.

There are known metal parts made of cast iron, etc., and plastic parts made of hard vinyl chloride, etc., and the pipes made of metal, such as cast iron pipes and steel pipes. Alternatively, a resin tube made of hard vinyl chloride or the like, and a fire-resistant double-layer tube in which the resin tube is coated with ceramic, (fire-resistant) mortar, or the like are known.
Japanese Patent Laid-Open No. 10-195947

To prevent a fire, smoke, or toxic gas from flowing out to an upper floor through a part of the drainage pipe system that has been burned or melted down in a building equipped with a drainage pipe system when a fire, etc. occurs downstairs, Conventionally, it has been thought that the entire drainage pipe system needs to have fire resistance.
However, if the entire drainage pipe system is to have fire resistance, it is necessary to make all the pipe joint members and pipes made of non-combustible materials such as metal, resulting in high costs. .

The present invention has been made in view of the above circumstances, and is a drainage pipe system that does not become an outflow passage for flames, smoke, toxic gases, etc. from the fire floor to an upper floor when a fire occurs in a building. An object of the present invention is to provide a piping structure having a drain pipe that can be constructed at low cost.

In order to achieve the above object, the present invention has taken the following measures.
That is, drain pipe structure according to the present invention, a tube-shaped tube body and the tube end joint portion or Rana Ru drain pipe provided in the main body, the drainage tube through the floor slab in the architectural material consists piping and member, refractory connected to, the joint portion is a straight tube end as the inserting portion inserted into the receptacle for connection with the lower joint portion of the pipe member, where thermally expandable fireproof material for closing said receptacle of expanded pre-Sharing, ABS pipe member at a constant temperature is provided on the outer periphery of the spigot portion of the joint portion.

The joint portion has an outer diameter smaller than that of the pipe body, and the thermally expandable refractory material is provided so as to make one round of the outer periphery of the joint portion .
Preferably, the outer peripheral surface of the thermally expandable refractory material and the outer peripheral surface of the pipe main body in the joint portion are aligned.
Here, the term “thermally expandable refractory material” means, as its volume and shape characteristics, that it does not hinder the connection between the vertical pipe joint member and the drain pipe below a predetermined temperature, and the vertical pipe joint member It does not interfere with the flow of drainage through the interior of the drain pipe, and expands when a predetermined temperature is exceeded during a fire, etc., and the interior of the drain pipe where this thermally expandable refractory material is provided Or the thing which bulges out into the vertical pipe joint member from there, and closes the inside (fills). Further, once the predetermined expansion has occurred, the subsequent heating does not cause burning or melting.

Here, the “predetermined temperature” refers to a temperature at which a specific thermal expansion material has thermal expansion, and is a temperature that varies depending on the material of the thermal expansion material. The temperature at which the heat-expandable refractory material that expands is selected depends on the materials of the components that make up the drainage pipes such as the standing pipe members of the building and the drainage collecting pipe, and the concept of fireproof design of the building. Is.
With such a configuration, even when a fire or the like occurs in a building, even if the drain pipe eventually burns or melts, the heat-expandable refractory material is heated above a predetermined temperature by fire heat. When this is done (before the drain pipe is completely burned or melted), the thermally expandable refractory material expands and closes the inside of the vertical pipe joint member.

  Therefore, if the vertical pipe joint member is fire-proof (for example, made of metal) that does not burn or melt, the through portion provided in the floor slab for arranging the vertical pipe joint member is the vertical pipe. Since the state of being blocked by the joint member is maintained, flames, smoke, toxic gases, etc. are generated from the fire floor to the upper floor due to burning or melting of the drain pipe system having the vertical pipe joint member and the drain pipe. Leakage is prevented.

In other words, even if the drain pipe is burnt or melted, it is possible to cope with a fire. Therefore, it is not necessary to use a fire-resistant pipe as this drain pipe, and a non-fire-resistant pipe (such as a resin pipe) is used. Can be adopted. Therefore, the cost of the entire drainage pipe system constructed using the piping structure having this drainage pipe can be reduced.

With the drainage pipe structure according to the present invention, a drainage pipe system is constructed at a low cost so that it does not become an outflow passage for flames, smoke, toxic gases, etc. from the fire floor to the upper floor when a fire occurs in a building. it can.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
3A and 3B show a reference example of the drainage pipe 1. The drain pipe 1 is made of a non-fire resistant material (for example, a resin material such as hard vinyl chloride). In other words, the material cost is low and the light weight is advantageous. However, if the material is exposed to a predetermined condition for a predetermined time at a fire site or the like, it may be burnt out or melted down.

The drainage pipe 1 is formed as a joint part 2 formed as an insertion part (straight pipe end part), a pipe body 3 extending from the joint part 2, and a receiving part on the other end side of the pipe body 3. And the joint portion 4 formed. A thermally expandable refractory material 5 is provided for the joint portion 2 formed as the insertion portion.
When the joint portion 2 is formed as an insertion portion as described above, when the drain pipe 1 is viewed alone, the joint portion 2 and the pipe body 3 may not be clearly distinguished. By connecting the drainage pipe 1 to a standpipe joint member 17 described later, a portion (the drainage pipe 1 and the standpipe joint member 17 are fitted into a joint part that is a receiving part of the standpipe joint member 17. The overlapping region OL) corresponds to the joint portion 2 of the drain pipe 1. In the drain pipe 1, it is only necessary that the heat-expandable refractory material 5 is provided in a range corresponding to the overlap region OL that can be formed by fitting with the joint portion 2 (not necessarily all). .

As shown in FIG. 3 (A), the thermally expandable refractory material 5 is provided in a state in which it goes around the outer peripheral surface of the joint portion 2, and the inner peripheral surface of the joint portion 2 as shown in FIG. 3 (B). It is divided roughly into the case where it is provided in a state of making a round.
The heat-expandable refractory material 30 is formed of, for example, butyl rubber containing graphite, and expands when a predetermined temperature (for example, 200 ° C.) is exceeded during a fire or the like, and the volume after expansion is larger than that before expansion. Therefore, it has a characteristic of reaching 5 to 40 times. For example, the trade name “Fibro” of Sekisui Chemical Co., Ltd. can be used. In addition, the product name “thermally expandable heat-resistant sealing material IP” manufactured by Inaba Denki Sangyo Co., Ltd. (starts expansion at 120 ° C. and expands to 4 times or more in volume), and products manufactured by Nichias Co., Ltd. The name “Permoflex (thermally expandable sheet)” (850 ° C., foamed after 30 minutes of heating and expands 4 times or more), and the product name “Heat Mel” (Furukawa Techno Material Co., Ltd.) (expansion start temperature 120 ° C., A remarkable expansion temperature of 260 ° C., which expands 4 to 8 times) can be used as the thermal expansion refractory material 9. In addition, the heat-expandable refractory material 9 is not limited to the above, and other various materials can be used.

As described above, the heat-expandable refractory material 9 can use a wide variety of materials having different reaction temperatures and expansion coefficients. Therefore, various conditions such as the reaction temperature and the pipe diameter required according to the construction place in the building are set. You can select and use the most suitable one.
As shown in FIG. 3A, when the thermally expandable refractory material 5 is provided on the outer peripheral surface of the joint portion 2, the joint portion 2 is made to correspond to the mounting position of the thermally expandable refractory material 5. A portion having a slightly smaller outer diameter is provided in advance, and the thermally expandable refractory material 5 is provided on the narrow portion so that the outer peripheral surface of the thermally expandable refractory material 5 and the outer peripheral surface of the tube body 3 are flush with each other. It is preferable to align them.

In this case, the thermally expandable refractory material 5 is a kneaded material that is kneaded and integrated with a packing material that produces water-stopping (appropriate elasticity) when it is below a predetermined temperature, and is prepared in a tape shape. This may be wound around the narrowed portion of the joint portion 2.
4 (A) and 4 (B), the drain pipe packing 7 and the thermally expandable refractory material 5 are separately formed, and then the drain pipe packing 7 and the thermally expandable refractory material 5 are connected to the joint portion. You may arrange in parallel along the longitudinal direction of 2.

Further, as shown in FIG. 3B, when the thermally expandable refractory material 5 is provided on the inner peripheral surface of the joint portion 2, the joint portion 2 corresponds to the mounting position of the thermally expandable refractory material 5. The inner diameter of the inner portion of the pipe body 3 and the inner peripheral surface of the heat-expandable refractory material 5 are provided by previously providing a portion whose inner diameter is slightly larger in diameter and providing the heat-expandable refractory material 5 in the larger-diameter portion. It is preferable to align the circumferential surface with the same surface.
In this case, the heat-expandable refractory material 5 is a kneaded material that is kneaded and integrated with a packing material that produces water-stopping (appropriate elasticity) when it is below a predetermined temperature, and is ring-shaped or cylindrical like a drain pipe packing. What is necessary is just to prepare what was shape | molded in this, and to make this fit inside the large diameter part of the joint part 2.

The above-described methods for providing the thermally expandable refractory material 5 are not limited to those shown in the reference examples. For example, the joint portion 2 is formed into a ring shape or a cylindrical shape in a thinned portion. It is also effective to use a method of externally fitting a thing, a method of performing a vulcanization step after mounting, and integrating the thermally expandable refractory material 5 with the joint portion 2 and the like.
Moreover, you may provide the thermally expansible refractory material 5 so that the outer peripheral surface and inner peripheral surface of the drain pipe 1 may be scattered in the circumferential direction, without making one round. Moreover, you may provide over the outer peripheral surface and inner peripheral surface of the drain pipe 1 over the full length direction.

The drain pipe 1 having such a configuration is used in a drain pipe system 10 as shown in FIGS. 1 and 2.
That is, the drain pipe system 10 is provided in a building such as an apartment house or a building. The drain pipe structure 11 allocated to each level of the building is connected over the entire building, and the building is formed at the top. It is constituted as a whole by connecting the extended vent pipe 12 connected to the rooftop or connecting the underfloor pipe or the underground main pipe through the bend 13 at the bottom.

  Each drainage pipe structure 11 is provided with a standing pipe joint member 17 penetrating through a through hole 15 provided vertically through a floor slab 14 of a building, and above and below the standing pipe joint member 17. A vertical pipe 18 is connected. A mortar 19 is packed between the outer peripheral portion of the vertical pipe joint member 17 and the inner peripheral surface of the through hole 15, and the vertical pipe joint member 17 is fixed to the floor slab 14.

The vertical pipe joint member 17 is, for example, the drainage collecting pipe 20 and is formed using a fire-resistant material (for example, a metal such as cast iron) as a raw material. That is, even if exposed to a predetermined condition at a fire site or the like for a predetermined time, it does not burn out or melt.
The drainage collecting pipe 20 has an upper joint portion 21 and a lower joint portion 22, and has a horizontal joint portion 24 that protrudes laterally from a pipe body 23 that connects between the upper and lower joint portions 21 and 22. Yes. A horizontal branch pipe 25 that connects a drainage facility such as a toilet bowl is connected to the horizontal joint portion 24.

The drain pipe 1 is used for the vertical pipe 18, the side branch pipe 25, the bend 13, etc. in a state where the joint portion 2 provided with the thermally expandable refractory material 5 is used for connection with the vertical pipe joint member 17. Is done.
That is, the drain pipe 1 is illustrated in FIG. 1 while the heat-expandable refractory material 5 is provided in the joint portion 2 that is the insertion portion as shown in FIGS. 3 (A) and 3 (B). In the drainage collecting pipe 20 as the standing pipe joint member 17, the upper joint portion 21 and the lateral joint portion 24 are the receiving portions, and the lower joint portion 22 is the insertion portion. The part 2 is used as a standing pipe 18 connected to the upper joint part 21 or a side branch pipe 25 connected to the side joint part 24.

  The drain pipe 1 used in the drain pipe structure 11 of FIG. 1 is of the type (shown in FIG. 3A) in which a thermally expandable refractory material 5 is provided on the outer peripheral surface of the joint portion 2. Therefore, the heat-expandable refractory material 5 includes the inner peripheral surface (the inner peripheral surface of the receiving portion) of the upper joint portion 21 in the vertical pipe joint member 17 and the outer peripheral surface (the outer peripheral surface of the insertion portion) of the joint portion 2 in the drain pipe 1 on the upper side. ) To be inserted between the circumferences.

Needless to say, the volume and shape of the heat-expandable refractory material 5 is set so that the connection between the vertical pipe joint member 17 and the drain pipe 1 is not hindered when the temperature is lower than a predetermined temperature. Thus, the volume and shape of the heat-expandable refractory material 5 are set on the assumption that the inside of the vertical pipe joint member 17 (upper joint portion 21) is closed after expansion.
Moreover, when the type (shown in FIG. 3B) in which the thermally expandable refractory material 5 is provided on the inner peripheral surface of the joint portion 2 is used as the drain pipe 1, the drain pipe structure 11 shown in FIG. become.

In this case, the volume and shape of the thermally expanded refractory material 5 are set with a focus on not adversely affecting the flow of the drainage flow in the drainpipe 1. It is the same that the setting is assumed to be a volume and shape sufficient to close the inside of the vertical pipe joint member 17 (upper joint portion 21) after expansion.
In the case of the drainage pipe system 10 having the drainage pipe 1 as described above, even if a fire or the like occurs in a building such as an apartment house or a building, a fire occurs due to burning or melting of the drainage pipe system 1. It is prevented that flames, smoke, toxic gases, etc. flow out from the upper floor to the upper floor.

  That is, assuming that a fire has occurred below the floor slab 14, the vertical pipe 18 on the lower side of the vertical pipe joint member 17 is burned or melted, or the lower pipe portion 22 between the vertical pipe 18 and the vertical pipe joint member 17. Ordinary drainage pipe packings (made of rubber, etc., which may be burnt or melted) burned or melted in the connection part of the pipe, and flame, smoke, Suppose that poisonous gas enters. In some cases, the vertical pipe joint member 17 itself may receive a fire heat and become high temperature.

When the vertical pipe 18 (drainage pipe 1) on the upper side of the vertical pipe joint member 17 starts to burn or melt due to these reasons, the thermally expandable refractory material 5 provided in the vertical pipe 18 (drainage pipe 1). The heat-expandable refractory material 5 expands and closes the inside of the upper joint portion 21 when a predetermined temperature is exceeded.
Further, assuming that a fire has occurred above the floor slab 14, the fire pipe heat causes the upper pipe 18 (drain pipe 1) on the upper pipe joint member 17 to start to burn or melt directly. Similarly to the above, the heat-expandable refractory material 5 expands and closes the upper joint portion 21 when a predetermined temperature is exceeded.

In short, in the stage where the upper pipe 18 (drain pipe 1) on the upper side of the vertical pipe joint member 17 is burnt out or melted down, the inside of the upper joint portion 21 of the vertical pipe joint member 17 is blocked by the already expanded thermal expansion refractory material 5. Therefore, passages for flames, smoke, toxic gases, etc. are blocked.
Since the vertical pipe joint member 17 itself has fire resistance, a fire may occur below or above the floor slab 14, but neither burns nor melts. As a result, the floor pipe member 17 is formed on the floor slab 14. The through hole 15 is maintained in the closed state by the vertical pipe joint member 17 and the mortar 19.

For this reason, it is possible to prevent the flame, smoke, toxic gas, etc. from flowing out from the fire floor to the upper floor due to burning or melting of the drain pipe system 11. In addition, since it is possible to prevent fresh air from being sucked from below the floor slab 14 against a fire that has occurred on the floor slab 14, there is also an effect that the expansion of the fire can be suppressed to a minimum.
Also in the drain pipe 1 connected to the horizontal joint portion 24 of the vertical pipe joint member 17, the action of closing the inside of the horizontal joint portion 24 by the thermally expandable refractory material 5 is obtained in the same manner as described above. In addition, outflow of toxic gas, inhalation of fresh air, etc. will be prevented.

In addition, if the lower joint portion 22 is a receiving portion like the drainage collecting pipe 20 shown in FIG. 6 as the standing pipe joint member 17, the joint portion 2 (thermally expandable refractory material) of the drainage pipe 1. 5) may be connected to the lower joint portion 22 .
Figure 6 interposed position of the thermally expandable fireproof material 5 shown in such as this inevitably to become the floor slab 14 and the arrangement of the lower, it perceives the early fire heat from the fire that happened downstairs, thermal expansion It can be said that it is beneficial in that quickness (responsiveness) for expanding the refractory material 5 is obtained.

Drainage pipe 1, as shown in FIG. 7 (A), adoptive hand portion 2 is what is the spigot part.
The drain pipe 1 shown in FIG. 9 is a reference example formed as a so-called fire-resistant double-layer pipe having a base pipe part 40 and a fire-resistant coating layer 41 covering the periphery of the base pipe part 40.
The raw pipe portion 40 is a portion that forms the original shape of the joint portions 2 and 4 and the pipe main body 3, and is formed of a non-refractory material such as resin. Further, the fireproof coating layer 41 is provided over the entire length of the raw tube portion 40 and is formed of a fireproof material such as ceramic, (fireproof) mortar, or metal plate.

In the illustrated example, the joint portion 2 on the side where the thermally expandable refractory material 5 is provided is an insertion portion, and the thermally expandable refractory material 5 is provided on the outer peripheral surface, and the joint portion 4 on the opposite side thereof. Indicates what is a receiving part.
In this case, the joint portion 2 corresponds to a place where the heat-expandable refractory material 5 should be attached to the fireproof covering layer 41 (region OL where the drain pipe 1 and the standing pipe joint member 17 are overlapped). The outer diameter of the outer peripheral surface of the pipe body 3 and the outer peripheral surface of the heat-expandable refractory material 5 are provided by providing a portion having a thin outer diameter in advance and providing the thermal expandable refractory material 5 in the thin portion. It is aligned to one.

A drain pipe 1 shown in FIG. 10 is a reference example in which a thermally expandable refractory material 5 is provided on the pipe body 3 side. That is, the heat-expandable refractory material 5 is held around the portion close to the joint portion 2 in the pipe body 3 while avoiding the vicinity of the joint portion 2 connected to the standing pipe joint member 17. The case where the joint part 2 is formed as a receiving part is illustrated.
In order to hold the heat-expandable refractory material 5 in the above-described arrangement with respect to the tube main body 3, a fire-resistant accessory member 50 is provided. The fireproof accessory member 50 has a tube exterior portion 51 formed so as to surround the outer peripheral portion of the tube body 3 over the entire circumference. The fireproof accessory member 50 has a joint exterior part 52 formed so as to surround the outer peripheral part of the joint part 2 over the entire circumference. Each of the tube exterior portion 51 and the joint exterior portion 52 is formed of a fireproof material (metal such as iron).

And between the circumference | surroundings of the pipe exterior part 51 and the pipe main body 3, the thermally expansible refractory material 5 is provided in the state which exhibits a cylinder shape. Therefore, when the joint portion 2 is externally fitted to a joint portion (such as the lower joint portion 22 of the drainage collecting pipe 20) as the insertion portion of the vertical pipe joint member 17, the both of the thermally expandable refractory materials 5 are over. It will be positioned out of the wrapping area.
In such a drain pipe 1, even if a fire or the like occurs in a building, even if the drain pipe 1 (pipe body 3) eventually burns out or melts down, before it is completely burned out or melted down, The heat-expandable refractory material 5 expands when heated above a predetermined temperature, closes the inside of the refractory accessory member 50, or expands from the refractory accessory member 50 into the vertical pipe joint member 17. Then, the inside of the vertical pipe joint member 17 is closed.

The joint exterior portion 52 is preferably formed in a cylindrical shape that surrounds the outer peripheral surface of the joint portion 2, but may be formed as a plurality of legs or a single leg.
The drain pipe 1 shown in FIG. 11 is also a reference example in which a thermally expandable refractory material 5 is provided on the pipe body 3 side. The difference from the drain pipe 1 shown in FIG. 10 is that the joint portion 2 is formed as an insertion portion. Accordingly, the fireproof accessory member 50 that holds the thermally expandable fireproof material 5 is a joint. It does not have the exterior part 52, but has the connection part 54 for fixing the pipe exterior part 51 to the pipe main body 3 side instead. The upper part of the refractory accessory member 50 is fixed to the lower joint portion 22 of the drainage collecting pipe 20 by fixing means 55 such as bolts. Note that the fixing means 55 is not limited to bolts, and adhesive tapes, adhesives, and other various types can be employed.

Other configurations and operational effects are substantially the same as those of the drain pipe 1 shown in FIG.
By the way, this invention is not limited to each above-mentioned embodiment, It can change suitably according to embodiment.
For example, the difference in whether the pipe body 3 is a long pipe or a short pipe, a thick pipe, or a thin pipe in the drain pipe 1 is not limited. Moreover, the drain pipe 1 which concerns on this invention can be implemented also as various types from which shapes differ, such as a T-shaped pipe (not shown) so that it may be clear from having demonstrated that the bend 13 was included.

It is a side view of the drain piping structure using the drain pipe of FIG. It is the side view which showed the drain pipe system constructed | assembled by the drain piping structure of FIG. The form of a drain pipe is shown, (A) is a side view of the type in which the thermally expansible refractory material was provided in the outer peripheral surface side, (B) is a side view of the type provided in the inner peripheral surface side. An example of a combination of a thermally expandable refractory material and a drain pipe packing is shown. (A) is a side sectional view in which the drain pipe packing is closer to the pipe end. (B) is a thermally expandable refractory material. It is the sectional side view which became near the pipe end. It is a side view of the drain piping structure using the drain pipe of FIG. 3 (B). It is a side view of the drainage piping structure at the time of making a vertical pipe joint member (drainage collecting pipe) different from FIG. It is the side view which showed the form of the other drainage pipe. It is the side view which showed the form of the other drainage pipe. It is the side view which showed the form of the other drainage pipe. It is the side view which showed the form of the other drainage pipe. It is a side view of the form of another drainage pipe, and the drainage piping structure using the same.

DESCRIPTION OF SYMBOLS 1 Drain pipe 2 Joint part 3 Pipe body 5 Thermally expansible fireproof material 14 Floor slab 17 Stand pipe joint member 22 Lower joint part 40 Elementary pipe part 41 Fireproof coating layer 51 Pipe exterior part 50 Fireproof attachment member 52 Joint exterior part

Claims (3)

A joint portion or Rana Ru drainage pipes provided at the end of the tube-shaped tube body and the tube body,
A piping member the floor slab through the connected fire resistance to said drain pipe in the architectural material within, consists,
The joint portion is a straight tube end as the inserting portion inserted into the receptacle for connection with the lower joint portion of the pipe member,
Drain pipe structure thermally expandable fireproof material for closing said receptacle of expanded pre-Sharing, ABS pipe member Jo Tokoro temperature, characterized in that provided on the outer periphery of the spigot portion of the joint portion. The joint portion has an outer diameter smaller than that of the pipe body,
The drain piping structure according to claim 1, wherein the thermally expandable refractory material is provided around the outer periphery of the joint portion . The drain piping structure according to claim 1 or 2, wherein an outer peripheral surface of the thermally expandable refractory material and an outer peripheral surface of the pipe main body in the joint portion are aligned.

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